Do deviations from radiance-invariance of metameric matches contradict the three pigment theory of foveal trichromacy?

@article{Alpern1990DoDF,
  title={Do deviations from radiance-invariance of metameric matches contradict the three pigment theory of foveal trichromacy?},
  author={Mathew B. Alpern and Huazhong Zhang and Jun Noji},
  journal={Vision Research},
  year={1990},
  volume={30},
  pages={1539-1553}
}
According to the pigment theory of matching, metameric matches result from the equation of the rates of photoisomerizations for each of the three classes of cone pigments excited by the two matched fields. If true, matches are radiance-invariant and additive. Tests of the theory in this paper show small but ubiquitous failures in radiance-invariance due to systematic rather than random errors in matching. A choice between two possible explanations for these systematic errors favors the view… CONTINUE READING
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